Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb2025fec094bf3…

MALICIOUS

PDF

84.5 KB Created: 2021-09-04 20:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0f092b6832e9f20ee80ffa50aca7c2e8 SHA-1: 1a7c08cdc4c781e92350f5d3e33724a2b3e6a74f SHA-256: 9bb2025fec094bf37687566e977671c495c6ade62d4ab3762783bdbd60274fa5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a payment redirection lure. The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/3ebcf6fa3e729fa2a37c107d8dcb2808/kuwisejijaruxojuva.pdf In PDF document text
    • http://harasim.cz/uploaded/files/82202765779.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/69122062365.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/c49c9d323e463877e5d8c4450b1c3671/vonoju.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/tikikiloke.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/78143904155.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/fazalekokoxozos.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/kexulajesuj.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/60385154687.pdfIn PDF document text
    • https://tappowine.com/file/92848020545.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/1g6kd96jhbuv19hprlpabm3qc2/15148396893.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/98586016989.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4afe6a5b6---tizapa.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/8e831796b16370485712bee6b999700f/90399687424.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/75149414104.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c43a41edd2---lazujapusezivom.pdfIn PDF document text
    • http://kinocosmik.ru/sadm_files/18608938422.pdfIn PDF document text
    • https://etimes.mn/uploads/files/xutizejavatima.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/85057015856.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf0785fc9---53850469716.pdfIn PDF document text
    • https://scalping.ir/data/files/file/47541826469.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/64789760222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=foreign+affairs+manual+e-2+visaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C7 10756 bytes
SHA-256: 3f062cc9ff3f93bbf5ac9297adfb9b205a83940cf4a033ea628fc809768065e9
font_01_sfnt_off0000fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 17736 bytes
SHA-256: 722eb31e5032196f826cdff2fa6486396707cd1a2ebc65f2e58fbf68f3038956
font_02_sfnt_off00012ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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